When light travels through different mediums, light will change speed depending on the density of the medium. This analogy can be useful: Here’s a clear explanation of how rainbows are formed with refraction: ******************************************************************* Diffraction occurs when light bends around … Continue reading →

Check out this link from the Exploratorium for a clear explanation of how rainbows are formed. A somewhat frazzled explanation of how rainbows are formed: (Thanks to Zara for this!) And if you haven’t seen the Double Rainbow video…